Method of casting cement



J. B. BROCKHURST METHOD OF CASTING CEMENT May5, 1942.

Filed Sept. 50, 1938" O]: O O- D O oose 0000000000 INVENTOR M 6, 6M M v 6. 4%. ATTORNEY Patented May 5, 1942 warren snares earn or ies 2 Claims.

My invention relates to an improved method of casting cement or concrete and my object is to provide an improved method by which a single layer of cement or concrete may be cast'to form a topping for a foundation comprising blocks of cement or concrete or a foundation formed of rocks and stones comprising a sea wall, jetty or the like.

In carrying my invention into effect I provide a suitable crane which is preferably carried upon a suitable tractor having preferably caterpillar treads, the latter being adapted to progress upon and along the top surface of previously constructed concrete or cement blocks in such layer or line. The tractor in question supports a suitable mold overhanging the already constructed foundation where a block is to be added and casting cementitious material, such as cement or concrete, in said mold to form an additional block at the forward edge of the layer or line of blocks already constructed.

When the cement or concrete has set to a sufficiently high state the tractor is moved forward and a new block is cast at the forward end of the blocks already constructed.

Preferably said mold is provided with an interior trough whereby the cast block is formed with a vertical channel which interlocks with the succeeding block thus assuring against displacement. utilizing bags of plastic cement for closing the openings between the bottom edges of the mold and the rocks, when the added blocks of cement or concrete are cast upon an irregular surface of rocks constituting the sea wall jetty or the like, but which may not be required when the added blocks are cast upon a sea wall or jetty proposed in the form of concrete blocks which present a smooth and even top surface.

In order that the invention may be better understood attention is directed to the drawing forming part of the present specification and in which Figure l is a top elevation showing my improved apparatus in its most improved form;

Figure 2 is a side View of the structure shown in Fig. 1 but with the adjacent side wall of the mold removed; and

Figure 3 is a longitudinal sectional View illustrating the employment of the apparatus for casting a line of concrete blocks on top of a sea wall, jetty or the like wherein I utilize bags of plastic concrete or cement for closing the openings between the bottom edges of the mold and the rocks.

I preferably provide a method for In the foregoing views similar elements are represented by the same numerals of reference.

I represents a suitable tractor preferably carried on caterpillar or endless treads 2. 3, 3 represents a suitable crane pivoted at the forward end of the tractor l. 4, 4 represent the longitudinal mold supports pivoted at 5--5 of tractor l and connected at their forward ends by a cross member 6 (see Figure 1). I, I represent the sides and I the front of the mold carried by the members 4, 4 and 6 and extending downwardly to any desired extent. The side or side walls 1 may extend down along the sides of the previously formed jetty when the latter is of substantially uniform thickness. Obviously the forward wall 1' does not extend down below the blocks for otherwise it would be impossible to lower the form to the proper position on top of the sea wall. 8 represents a vertical trough carried by the front of the mold and adapted to form the vertical slot 9 (see Figure 1) whereby the cast blocks are provided with vertical interlocks to prevent lateral displacement under the effect of the elements. When a series of cement or concrete blocks is to be laid upon a sea wall or pier or the like comprising a series of vertical blocks It) as shown particularly in Figure 2 the mold in lowered position closely hugs the sides of the sea wall but when the blocks are cast for instance upon a stone jetty as shown in Figure 3 bags of plastic cement or concrete II are preferably packed in around the bottom of the mold to fill in the spaces between the mold and rocks in order to prevent leakage of cement or concrete through said openings. A cable I2 leading over the crane 3 sustains the pivoted mold at the proper height as will be understood.

Due to the pivotal connection of the longitudinal mold supports 4, 4 with the tractor the longitudinal position of the mold along the sea wall will be determined directly by the position of the tractor and if the mold is lowered from a raised position to the position shown in Fig. 2 the sides 1 of the mold will pass down along the sides of the sea wall previously built and will hug the same. After a block is cast with the mold in any one of its positions along the sea wall and the block is sufliciently set, the mold may then be raised and the tractor moved forward to place the mold in a new position. During this travelling of the tractor the sides of the mold or the mold supports 4 will still be in engagement with the sides of the last formed block and will serve to guide the mold and tractor to positions such as to properly position the mold when again lowered in position to cast a new block.

In operation I proceed by supporting the mold overhanging the forward edge of the line of aligned concrete blocks which have been cast and cast a block of cement or concrete in the mold to constitute the additional block to be formed. This operation is repeated when the block is sufficiently set to afford proper support for the apparatus.

What I claim is:

1. The method of casting a line of blocks to form the top of a previously built jetty'or like structure, which comprises supporting a mold 15 having front and side walls from a traveling mold-lifting-and-shifting device resting on a part of the line already constructed and connected to the mold so that engagement ofthe side walls with the sides of blocks previously formed will guide the traveling device and the mold when lowered will be held against movement relative to said traveling device longitudinally of said line, positioning said mold over a part of said jetty on which an additional block is to be cast, casting a block in the mold thus positioned, moving the mold to a new position by lifting and advancing the mold and then lowering it into casting position.

2. The method of casting a line of blocks to form the top of a previously built jetty or like structure of substantially uniform width, which comprises supporting a mold having a front wall and side walls of greater depth than the blocks to be cast, from a traveling mold-liftingand-shifting device resting on a part of the line already constructed and connected to the mold so that engagement of the side walls with the sides of blocks previously formed will guide the traveling device and the mold when lowered will be held against movement relative to said traveling device longitudinally of said line and with the lower parts of said side walls extending downwardly at the sides of said previously built jetty, positioning said mold over a part of said jetty on which an additional block is to be cast, casting a block in the mold thus positioned, moving the mold to a new position by lifting and advancing the mold and then lowering it into cast-- ing position.

JAMES B. BROCKHURST. 

